Centrifugal pump.



Tf R.' HAYTON.

GENTRIFUGAL PUMP.

APPLICATION FILED JULY 8, 1911.

Patented July 16, 1912.

T. R. HAYTON.

l GBNTRIFUGAL PUMP.

. APPLICATION FILED JULY B, 1911.` 1,032,828.

z SHEETS-SHEET z.

' Patented July 16, 1912.

1/9211672 ora Zarfzas @M impeller, the function of which is to impart THOMAS RUSSELL HAYTON, 0F QUINCY, ILLINOIS.

CENTRIFGAL PUMP.

Application med July s, 1911, serial No. esmas.

specification of Letters Patent.-

Patented July 16, 1312.

To all whom it may concern:

`Be it known that I, THOMAS RUssELrl HAYTON, a citizen of the United States, re'

lsiding in Quincy, \in the county of Adams and State of Illinois, have invented new and useful Improvements lin Centrifugal Pumps, of which the following is a specification.

This invention relates tov centrifugal pumps of the type employing double runners orimpel ers,.and the object of t-he invention is-to provide a novel construction and organization of parts whereby Aa pump will be provided which will yield a very high efficiency in operation.

` To this end the invention resides briefly in providing a casing with two suction or inlet openings, and the ordinary volute terminating in a discharge opening, and in locating within the casing a central relatively small the initial speed to the water, land also to discharge the water therefrom `at practically the-speed it will'have when passing into the volute. Surrounding the impeller is located a rotary member with blades located a suitable distance beyondthe impeller and termi# nating short of the periphery of the rotary member, the impeller and the rotary mem berl being mounted on different shafts and separately rotated from different pulleys, the speed of rotation of the rotary member being such that in practice it will neither retard nor accelerate the speed of the water acquired from the impeller. Arrangements are likewise provided for maintaining an air-cushion between the sides ofthe rotary member and the wall of the casing and to prevent the' air from leaking through the bearings at the center by means of -a water sealfthe'supply of air and Water for these purposes being automatically provided in the operation of the pump. The blades of the rotary member are provided largely as supports or braces to prevent the walls of 4the s'aid member from cavingin under the high pressure to which they are subjected. This and other details of construction, however, will more clearly appear fromy the description to follow.

In the accompanying drawings-Figure 1 is a view in side elevation of a pump constructed-according to my invention; Fig. 2 is a longitudinal sectional view of theA same onan enlarged scale; and Fig. is a cross sectional view.

Referring'now to the draWings,-1 indicates the caslng providing a volute 2, termi'- nating in a discharge spout 3j Extending 5, and driven byia pulley 6. Extending intt the casing from the opposite side fromthat described is a smaller "shaft 7, havingitsin-l ner end mounte'din vthe shaft 4,'and driven independent-ly from the latter shaft by means of a pulley I8. Suitable bearings 9 are provided for the shaft 7. The Vcasing 1 provides two suction Yo enings 10.

11 indicates, genera l the impeller, the blades 12 of which :are suitably supported at their center by means of a'circularplate 13 mounted on ahub 14, which,`inturn, is secured to the shaft-7. At their outerends the blades 12 are secured to annular rings 15, which rings have a-'stepped 'bearin indi# cated at 16, on asimilar annular 'rlilg 17 which forms a part of the'rotary member. The annular rings 17 have two Istepped bearings on their outer` side in the walll ofthe casing 1, as indicated at 1 8 and 19, t-he'se` bearings being separated by' small annular spaces 2O with. which connect water channels` volute with the central bearing of the im#` peller. The channels 21 are providedT at intervals around the entire t casingx "of the pump, and extend radially from the volute 2 to the annular spaces 20."

22 indicates a hollow, rotary member, the walls 23 of which are connected at'their center to the annular rings 17, as indicated at 24. The sides of the rotary memberv converge toward the periphery, and the inclination is such as to' make the are'as of successive annular cross' sections of the rotary member equal; thus compensating for the increase in volume of a circular chamber toward the periphery so 'that the rotary member 'will runfull of water fed the central impeller. A'furt-her object subserved by converging the walls "of they rotary-*meme ber is'to give additional resistance to pressure from the outside:` '"1" I 25 indicate hubs-,Wne of vwhich is secured on` the shaft 4,and`t-he Aother 'of which is loosely -mounted"on the shaft'7, between which' hubs` and the annular ringslT' are Extending between the walls 23 of the rotary member are a circular series of blades 27 the shape of which is more clearly shown in Fig. 3. As will be seen, these blades are substantially V-shaped, except that their walls are on curved lines, and the end of one blade enters a slight distanceV in the opening of the adjacent blade. ,As heretofore stated, the blades 27 are primarily intended as supports for the walls 23 of the rotary member, and the particular shape adopted I deem best calculated to provide the firm support necessary without thereby offering any hindrance to the free passagel of the water to the volute 2 unde1 the speed acquired from the impeller 11. In practice the rotary member 22 is run at such speed thatthe center of the blades 27 which is the pointed portion indicated by 28will have the same speed of rotation as the peripheral speed of the impeller 11., Between the periphery ofthe impeller and the lower portion of the blades 27 there' is provided a free annular space 29, and the, water rotating under its own momentum in this space will-have, therefore, tation than the lower portions 30 of the blades 27, hence this water can readily pass through into the spaces 31 between therespective blades without diminution of its speed. As the water enters the space 32 opposite the end of each blade and inclosed by the adjacent blade it will be acted on by.

the upper members 33 of the blades as it passes out of the spaces 34, and in case the water has lagged a little in speed it will be speeded up by the blades. I wish it to be distinctly understood, however, that the form of Vblade described is that which at present I conceive to be the best form to support the walls of the rotarymember without impeding the speed of the water. Other forms of blade might answer just as well, as I do not desire the rotary member to accelerate the speed of the waterto any material extent over that imparted to it by the impeller, the function of the vrotary member being to prevent, by its rotation, frictional resistance being offered to the water as it passes under the speedimparted to it by the impeller, and by centrifugal force through the rotary member and into the volute 2. Between the blades 27 and the periphery of the rotary member there is ar greater speed of roan annular space 35 provided. That is to say, the blades 27 do not extend out to the periphery of the rotary member.'

peller and the blades 27, and the.space 35 between the'blades 27 and the periphery of the rotary member I provide for utilizing the centrifugal force of theV water under By the provision of the space 29 between the im the speed imparted to it by the impeller without expending any further power upon the water, the full centrifugal force of the water being thus conserved, and as thiswater under the action of centrifugal force is moving against the walls of the rotary.

member, which themselves are moving at substantially the same rate of speed, thereis practically no resistance offered to the free course of thewater from/ the time it leaves the impeller until it passes out into the volute of the pump.

In order to provide for' the access of air to the spaces 36-between the sides of the roy tary member and the opposite sides of the casing, one or both suction inlets 1t) is provided'with an air inlet `valve 37 so that air may be drawn in with the water, and as it passes out with the water the tendency" will be for the air to be Ydrawn back into the spaces'36 around the periphery of the ro As it is possible, however;

tary member. that a suficient amount of air may not passinto the spaces 36 I provide for this emergency by mounting on the discharge pipe 38 f an air dome 39 communicating with the 4interior of said pipe, so that as air passes out icol with the water it will be trapped in the air dome 39. From the top of the air dome 39 leads a pipe 40 which is connected through.

avalve 41 with pipes 42 which lead through l opposite sides of the easing'of the pump aid communicate with the spaces 36. iis

Byt

means the spaces 36 will be continuously provided with 4air and thereby prevent water from passing into these spaces, the presence of the water offering considerable resistance to the movement of the rotary.

member. Owing to the enormous suction at the centerof the pump and the pressure l at the'periphery of the rotary member the air will not remain in the spaces 36, but will pass out at'the bearings at the center of the pump unless its escape isprevent'ed. To provide for. sealing the air in4 the spaces 36 I provide the water channels 21, heretofore described, through which water under the aenormous pressure in the volute will be forced into the `annular spaces 20, and as this pressure is continuous there will be an annular wall of water under great 'pressure interposed between the stepped bearings 19 and the stepped bearings 20, which will preve`nt air from escaping through the latter to the center of the pump where its presence will be exceedinglydetrimental. I provide` an annular channel or throat 43vconnecting' the Working chamber of the rotary member with the volute, to insure a greater pressure of water in the volute, and therefore at the water seal, than at the periphery of the larger impeller.

The operation of the pump has been included in the foregoing description, and it needs only to add that in the operation of a pump constructed and organized as described a unich higher eliiciency can be 0btained than with anyother form of centrifugal pump of which I am aware.

Iclaim:

1. In a centrifugal pump the combination with a pump casing of a rotary impeller lo cated therein, a hollow rotary member encircling and immediately adjacent to. said impeller and forming a chamber in communication with the casing into which said impeller immediatelydelivers, said member comprising side walls suitably supported in position to constitute such chamber and being free from obstructions in the portion of the chamber adjacent to the impeller, and means for independently rotating said impeller and rotary member in the same direction.

2. In a centrifugal pump the combination with a pump casing of a rotary impeller located therein, a hollow rotary member en circling and immediately adjacent to said impeller and forming a chamber in communica-tion with the casing into which said impeller immediately delivers, said member comprising side walls and supports connecting them which are placed at a distance from the impeller, and means for independently rotating said impeller and rotary member in the same direction.

3. In a centrifugal pump the combination with a pump casing of a rotary impeller located therein, a hollow member encircling and immediately adjacent to said impeller and forming a chamber in communication with the casing into which said impeller immediately delivers, said member comprising side walls and supports connecting them which are placed at a distance from the impeller and from the periphery of the rotary member, and means for independently rotating said impeller and rotary member in the same direction.

4. In a centrifugal pump, in combination with a pump 'casing having a volute, a.v rotary member mounted in the casing having av runningjoint connection therewith and operating to discharge water into said volute, the construction affording air spaces l between the walls of said member and the walls of the casing, means for admitting air to said spaces, a'water seal surrounding each of said running-joints, conduits connecting said water seals and the volute, whereby water will be continuously supplied to and maintained under pressure 1n said water seals 'to prevent the escape of air through the said running-joints, and means for rotating said member.

5. In a centrifugalpump, in combination with a central impeller, a hollow rotary member encircling and immediately adjacent to the same, saidmelnber comprising side walls and supports connecting them -volute whereby water will vbe supplied to and continuously maintained under pressure in said water seals to prevent theescape of air through the bearings, and means for independently rotating said impeller and rotary member in the same direction.

6. In a centrifugal pump, in combination with the pump casing having a volute, a hollow rotary member mounted in the Vcasing-and operating to discharge water into said volute, the construction affording air spaces between the walls of said member and the walls of the casing, and means for automatically collecting air passing through the pump and conducting it to said` spaces.

7. In a centrifugal pump, in combination with the pump casing having a volute, a hollow rotary member mounted in the casy ing and having a running-joint connection on opposite sides therewith, and operating to discharge water into said volute, the construction aiiording air spaces between the walls of said member and the walls of the casing which terminate at their base in said running-joints, water seals encircling the said running-joints, means for automatically collecting air passing through the pump and conducting it to said spaces, and means for automatically maintaining a supply of water in said water seals under pressure, whereby to preventthe escape of air from said spaces through said running-joints.4

S. In a centrifugal pump in combination with a central impeller, a rotary member surrounding the impeller, the construction providing spaces between the walls of said member and the walls of the casing, a water seal surrounding the bearings of the rotary member, water channels leading from the volute of the pump to said water seals, an air chamber communicating with the outlet pipe of the pump, pipes communicating with said chamber and said spaces, respectively,

and means for independently driving said i member and the wall of the casing, a Water In testimony whereof, have heieunto set seal surrounding the bearing of said memmy hand in presence of two subscribing Witber, water Channels leading from the volute nesses.

f the pump to said water seals, and means THOMAS RUSSELL HAYTON. 5 for automatically collecting air passing TVVitnesses:

through the pump and supplying it to sail HENRY GERMANN,

spaces. PETER E. PINnEL-MANN.

'Genies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

. Washingon, D. G. 

